diff --git a/tests/components/webostv/test_trigger.py b/tests/components/webostv/test_trigger.py
index be84bcd2135..af4778d0fdc 100644
--- a/tests/components/webostv/test_trigger.py
+++ b/tests/components/webostv/test_trigger.py
@@ -1,11 +1,16 @@
 """The tests for WebOS TV automation triggers."""
+from unittest.mock import patch
+
 from homeassistant.components import automation
 from homeassistant.components.webostv import DOMAIN
+from homeassistant.const import SERVICE_RELOAD
 from homeassistant.helpers.device_registry import async_get as get_dev_reg
 from homeassistant.setup import async_setup_component
 
 from . import ENTITY_ID, setup_webostv
 
+from tests.common import MockEntity, MockEntityPlatform
+
 
 async def test_webostv_turn_on_trigger_device_id(hass, calls, client):
     """Test for turn_on triggers by device_id firing."""
@@ -48,6 +53,21 @@ async def test_webostv_turn_on_trigger_device_id(hass, calls, client):
     assert calls[0].data["some"] == device.id
     assert calls[0].data["id"] == 0
 
+    with patch("homeassistant.config.load_yaml", return_value={}):
+        await hass.services.async_call(automation.DOMAIN, SERVICE_RELOAD, blocking=True)
+
+    await hass.services.async_call(
+        "media_player",
+        "turn_on",
+        {"entity_id": ENTITY_ID},
+        blocking=True,
+    )
+
+    await hass.async_block_till_done()
+    assert len(calls) == 1
+    assert calls[0].data["some"] == device.id
+    assert calls[0].data["id"] == 0
+
 
 async def test_webostv_turn_on_trigger_entity_id(hass, calls, client):
     """Test for turn_on triggers by entity_id firing."""
@@ -118,3 +138,40 @@ async def test_wrong_trigger_platform_type(hass, caplog, client):
         "ValueError: Unknown webOS Smart TV trigger platform webostv.wrong_type"
         in caplog.text
     )
+
+
+async def test_trigger_invalid_entity_id(hass, caplog, client):
+    """Test turn on trigger using invalid entity_id."""
+    await setup_webostv(hass, "fake-uuid")
+
+    platform = MockEntityPlatform(hass)
+
+    invalid_entity = f"{DOMAIN}.invalid"
+    await platform.async_add_entities([MockEntity(name=invalid_entity)])
+
+    await async_setup_component(
+        hass,
+        automation.DOMAIN,
+        {
+            automation.DOMAIN: [
+                {
+                    "trigger": {
+                        "platform": "webostv.turn_on",
+                        "entity_id": invalid_entity,
+                    },
+                    "action": {
+                        "service": "test.automation",
+                        "data_template": {
+                            "some": ENTITY_ID,
+                            "id": "{{ trigger.id }}",
+                        },
+                    },
+                },
+            ],
+        },
+    )
+
+    assert (
+        f"ValueError: Entity {invalid_entity} is not a valid webostv entity"
+        in caplog.text
+    )